naam$var='value' doesn't work
Need to use it in a loop : naam$var=$(sed -n $var"p" namefile.txt)
Dynamic variable names in Bash doesn't do the trick for me. Maybe i didn't understand it inuff, but I already spend time on this. For me it just doesn't work it.
I hope to find someting that works, and is not to long, or complex. And if the loop works, my script should be smaller, faster and smoking enter image description here
# To create example file 'naam.txt' echo "John " > naam.txt echo "Susan " >> naam.txt echo "Nicole " >> naam.txt echo "Betsy " >> naam.txt
# This works for me now
naam1=$(sed -n 1"p" naam.txt)
naam2=$(sed -n 2"p" naam.txt)
naam3=$(sed -n 3"p" naam.txt)
naam4=$(sed -n 4"p" naam.txt)
echo $naam1
echo $naam3
echo $naam2
echo $naam4
# But i want to use it in a for loop.
# '$var' will be used twice in one line
# 'naam$var=value' doesn't work
for var in 1 2 3 4
do
naam$var=$(sed -n $var"p" namefile.txt)
done
echo $naam1 $naam4
Solved
I found this solution with to links from https://stackoverflow.com/users/4154375/pjh Thanks pjh Most from: Creating a string variable name from the value of another string And 1 line from: How can I generate new variable names on the fly in a shell script? I used it like this:
num=5 # amount of names you need.
for (( i = 1; i <= $num; i++ ))
do
CONFIG_OPTION="naam$i" # Name of new variable
CONFIG_VALUE=$(sed -n $i"p" naam.txt) # value of new variable
printf -v "$CONFIG_OPTION" "%s" "$CONFIG_VALUE" # magic happens here
done
#creat a testfile
echo "John " > naam.txt
echo "Susan " >> naam.txt
echo "Nicole " >> naam.txt
echo "Betsy " >> naam.txt
# create some output to see of it works
echo "1 $naam1"
echo "2 $naam2"
echo "3 $naam3"
echo "4 $naam4"
echo "5 $naam5"
echo "6 $naam6"
